Audi Q7 2007 - 2.10 Checking Valves

Audi Q7 2007 !
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
Repair Group 15 – Cylinder head, valve gear
6
134
Procedure
– Insert valve into valve guide.
• End of valve stem must be flush with valve guide.
Only insert inlet valve into inlet guide and exhaust valve into
exhaust guide, as the stem diameters are different.
– Determine amount of sideways play:
• Wear limit: 1.0 mm.
♦ If the wear limit is exceeded, repeat the measurement with
new valves. Renew cylinder head if wear limit is still ex-
ceeded. Valve guides cannot be renewed.
♦ If the valve has to be renewed as part of a repair, use a
new valve for the measurement.
2.10 Checking valves
– Visually inspect for scoring on valve stem and on surface
of seat.
If scoring is clearly visible:
– Renew the relevant valve.
Note
Note
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